Steam-generator.



JNO. 866,188. PATENTED SEPT. 17, 1907.

' T. R. BUTMAN. i

STEAM GENERATOR.

APPLICATION FILED DEC. 10; 1906.

2 SHEETS-SHEET 1.

THE NORRIS PETERS 00., WASHINGTON, n. c.

' No. 866,188. PATENTED SEPT. 17, 1907.

* T. R. BUI'MAN.

STEAM GENERATOR.

APPLIGATION FILED DEC. 10 1906.

2 SHEETS-SHEET 2.

THOMAS REED BUTMAN, OF LAKE BLUFF, ILLINOIS.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed December 10,1906. Serial No. 347,163.

To all whom it may concern:

Be it known that I, TuoMAs REED BUTMAN, a citizen of the United States, residing at Lake Bluff, in the county of Lake and State of Illinois, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

My invention relates to improvements in steam generators, and more particularly to generators or boilers ofthe vertical type.

One object of my invention is to provide a boiler having large heating surfaces, simple in form, cheap of construction and highly eflicient in operation.

Another object of my invention is to provide, in a boiler, a space shut off from the path of general circulation, into which the water supply shall be first admitted and through which a suitable number of con duits, carrying the exit gases of relatively low temperature shall pass for the purpose of raising the temperature of the feed water therein contained, before it passes into the path of general circulation.

Still another object of my invention is to provide a means for more uniformly distributing the heat to the surfaces of the the box to prevent the impingement of the heat rays of highest temperature directly upon the flue sheet constituting the top of the fire box.

Other objects of my invention will become apparent to those skilled in the art from the drawings, forming a part of this specification, and from the following description.

In the drawings; Figure 1 is a vertical section taken on 1ine 1l of Fig. 2. Fig. 2 is a top or plan view, showing a part broken away to expose the fire tubes and the head of the boiler shell below. Fig. 3 is a fragmentary section of a part of the construction, taken on lines 3-3 of Fig. 1.

In all of the views the same numerals of reference indicate similar parts.

5 is an outside shell, containing the head 6, and an annular flue sheet 7.

8 is a shell, of cylinder, of smaller diameter, a portion 9 of which extends into the larger shell, to provide a 'feed-water-containing space between the outer shell and the said cylinder, as shown in the drawings. The inner shell, or cylinder, is joined to the outer shell by the annular flue sheet 7 in the manner shown. The inner shell, or cylinder, is connected to the fire box by means of the annular concave head 10 providing there by a settling chamber or mud container in the bottom of which a blow-off pipe 11 is placed.

The side walls of the lire box 12 is preferably corrugated for the purpose of providing slight vertical movement, due to expansion'and contraction, as usual in such cases. The flue sheet 13, affording a top for the Tire box, is perforated for the admission of fire tubes 14, which are suitably grouped around the axis of the boiler, in the manner shown more clearly in Fig. 2, to

provide spaces for admission of the boiler braces 1.5.

The upper ends of the fire tubes 14: are expanded into the head 6 of the shell 5. The tubesl l are spread at the top, as shown, to provide a space 16 for the admission of the steam discharge pipe 17, and for the further purpose of providing the openings necessary for the brace bars 15, as heretofore described. Return fire tubes 18 are also expanded into the head 6, andextend through the space, which I have heretofore referred to as the feed-water-containing space, the lower ends of which are expanded into the annular flue sheet 7, the said tubes terminating in a fire box, or flue, 18, which in turn communicates with the breeching, or smoke pipe 19. To the upper part 9, of the cylinder 8, is attached a series of vertically extending tie-bars 20 which are connected to the upper part 9, of the cylinder 8, and also to the head 6 of the shell 5, to bear a part of the strain that would otherwise come on the shell 5 and the tubes 14, and to relieve the fire box of undue strain.

The space between the upper part 9 of the cylinder 8 and the shell 5, into which the feed water supply is to be admitted primarily, functions in every respect similar to well known economizers. which are devices usually used in association with steam boilers by means of which the uptake, or exit gases, are employed for heating the feed water before it is admitted into the path of circulation of the boiler. In this instance the oconomizer device becomes a part of the boiler, in which the water is heated by means of the hot exit gases just before they leave the boiler,'the water being confined so as not to be permitted to enter the path of general circulation until its temperature his been suificiently raised.

In the bottom of the annular feed water chamber, just described, is placed a blow-off pipe ,21, for blowing off the settlings or mud that might otherwise remaii in the chamber and become detrimental to its use A feed water pipe 22 is shown, by means of which the water, to be supplied to the boiler for steam making purposes, is admitted into the feed water space. Handholes 23 are made into the outer shell 5 at suitable intervals for the purpose of cleaning the economizing chamber, or the annular space intervening between the upper part 9 of the cylinder 8 and the shell 5. In Fig. 2 it will be noted that certain of the tubes 18 have been left out on either side of the manhole 24 for the purpose of providing room for the entrance of persons in attendance, within the shell 5 of the boiler, for convenient cleaning and for repairs of the boiler.

25 is a fragmentary portion of the furnace, showing a passage way for the gases to enter the fire box 12. In the center of the fire box is a pier 26 of' relatively refractory material, such. as fire brick, or made of a series of disks of :lire brick clay, properly baked, or

other heat-absorbing and refractory material, the object ofwhich is to absorb the heat from the direct and intense rays and subsequently disperse it against the vertical sides of the fire box, whereby a more uniform distribution of heat is accomplished and the direct impingement of the intense blast is prevented from injuring the flue sheet into which the tubes 14 enter.

My boiler is adapted to receive the hot gases from any source of heat. Where a special furnace is to be constructed one of the Dutch-oven variety is well adapted to its use. Or the hot gases arising from any other source, such as a puddling furnace may be directed into the fire box and utilized in the desired manner.

27 is a smokebox for conducting the hot gases of combustion from tubes 14 to the return tubes 18. The heated gases from any source may be conducted into the fire box 12, from whence they will pass through the series of tubes 14 into the smoke box 27, from thence to the annular smoke box 18 by means of the fire tubes 18, and thence to the smoke stack by means of the breeching or smoke pipe 19. As heretofore stated, the gases of lowest temperature will pass through the tubes 18 and heat the water contained in the space between the upper part 9 of the cylinder 8 and that portion of the shell before it mixes with the steam-making water.

The use and operation of my invention will be well understood by those skilled in the art.

While I have herein described, in some detail, a specific embodiment of my invention, do not desire to be limited to the exact construction shown in the drawings, as considerable variation may be made without departure from the spirit and scope of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent, oi the United States, is:

1. A vertical steam boiler comprising a shell, a fire box within said shell, an open-ended annular cylinder, between said fire box and the shell extending above said fire box to provide an annular feed-water space between said shell. and cylinder, a series of fire tubes communicating with said fire box and extending through said shell, a so rics of return fire tubes annularly arranged and passing through said shell in the annular space provided between said shell and cylinder, and a water feed pipe communicating with said feed-water space.

2. A vertical steam boiler comprising a shell, 21 fire box within said shell, an open-ended annular cylinder between said fire box and shell extending above said fire box to provide an annular feed-water space between said shell and cylinder, a series of fire tubes communicating with said fire box extending through said shell and spaced further from the axis of the boiler at the top than at the bottom, a series of return fire tubes annularly arranged and passing through said shell in the annular space provided between said shell and cylinder, and a water feed pipe communicating with said teed-water space.

3. A vertical steam boiler comprising a shell, a fire box within said shell, an open-ended annular cylinder between said fire box and shell, extending above said fire box to provide an annular feed-water space between said shell and cylinder, a series of fire tubes communicating with said fire box and extending through said shell, a steam discharge opening communicating with the axial space so provided near the top of the shell, a series of return fire tubes annularly arranged and passing through said shell in the annular space provided between said shell and cylinder, and a water feed pipe communicating with said feed-water space.

4. A vertical steam boiler comprising a shell, a fire box within said shell, an open-ended annular cylinder between said fire box and shell extending above said fire box to provide an annular feed-water space between said shell and cylinder, a series of return fire tubes annularly arranged and divided into groups, or sections, to provide spaces at intervals for brace rods, brace rods within said spaces extending from the side walls to the head of the shell.

A vertical steam boiler comprising a shell, a fire box within said shell, an open-ended annular cylinder between said fire box and shell extending above said fire box to provide an annular feed-water space between said shell and cylinder, a series of return fire tubes annularly arranged and divided into groups or sections, to provide spaces at intervals for brace rods, brace rods within said spaces extending from the side walls to the head of the shell, a man hole in said shell opening into one of said spaces between contiguous groups or sections of said tubes.

6, A vertical steam boiler comprising a shell of larger diameter, a shell of smaller diameter open at its top end and extending into said shell of larger diameter to a point above the top of the fire box, a fire box within the smaller shell, an annular flue-sheet joining the two shells at the lower end of the large shell, a series of fire tubes communicating with said fire box and extending through said larger shell, a series of return fire tubes annularly arranged and passing through the head of the said larger shell and the said annular flue sheet, and an annular smoke box surrounding the said smaller shell.

7. A vertical steam boiler comprising a shell of larger diameter, a shell of smaller diameter open at its top end and extending into the said shell of larger diameter to a point above the top of the fire box, vertical brace-rods spaced at intervals and tying the upper end of the said smaller shell to the head in the upper end of the large shell, :1 fire box within the smaller shell, and an annular flue sheet joining the two shells at the lower end of the larger shell.

8. A vertical steam boiler comprising a shell of larger diameter, a shell of smaller diameter open at its top end and extending into the said shell of larger diameter to a point above the top of the fire box, a fire box within the smaller shell, an annular sheet joining the two shells at the lower end of the larger shell, a water feed pipe communicating with the annular space between the two shells, fire tubes passing through the said annular space, and a blow-0ft pipe located in or near the bottom of the said space.

9. A vertical steam boiler comprising a shell, conduits through the shell for conducting the heated gases, an

open-ended cylinder extending upwardly from the bottom of the shell intermediate the said conduits and the side walls of the said shell, and other conduits for the passage of the heated gases within the space between the said cylinder and shell.

10. In a vertical steam boiler, a fire box having a top flue sheet, a surrounding shell, fire tubes opening through the flue sheet and extending through the shell, and a pier of relatively refractory material extending'axially into the fire box for imparting heat to the vertical side walls of said fire box.

In testimony whereof I hereunto set my hand in the presence of two witnesses.

THOMAS REED BU'lMAN.

In the presence of Gno. '1. h/IAY, .Tr., Manx F. ALLEN. 

